EDELBROCK Victor Jr. LS3 CYLINDER HEADS CATALOG

EDELBROCK Victor Jr. LS3 CYLINDER HEADS ® CATALOG #61339 and 61349 INSTALLATION INSTRUCTIONS

PLEASE study these instructions carefully before beginning this installation. Most installations can be accomplished with common tools and procedures. However, you should be familiar with and comfortable working on your vehicle. If you do not feel comfortable performing this installation, it is recommended to have the installation completed by a qualified mechanic. If you have any questions, please call our Technical Hotline at: 1-800-416-8628, 7:00 am - 5:00 pm, Pacific Standard Time, Monday through Friday. IMPORTANT NOTE: Proper installation is the responsibility of the installer. Improper installation will void your warranty and may result in poor performance and engine or vehicle damage. DESCRIPTION: These Victor Jr. cylinder heads are designed for GM Actual piston-to-valve clearance should be specified by your camshaft Gen III & IV LS engines. These heads provide great “out-of-the-box” manufacturer. Valve-to-bore clearance should also be checked, and the performance and feature fully CNC ported 280cc intake and 85cc top of the bore notched for clearance, if necessary. exhaust ports. The combustion chambers are CNC profiled to match. ACCESSORIES: Although Edelbrock Cylinder Heads will accept OEM 61339 is drilled for standard GM Gen III & IV LS blocks while 61349 is components (valve covers, intake manifold, etc.), Premium quality drilled for 6-bolt per cylinder LSX blocks, but can be used on stock Gen hardware is recommended. III & IV LS blocks. HEAD BOLTS OR STUDS: High quality head studs or head bolts with Heads are assembled with the following components: hardened washers must be used to prevent galling of the aluminum q High quality, stainless steel, one-piece, 2.200” intake and 1.60” bolt bosses. Edelbrock head bolt kit #8596 (Gen III) and #8595 (Gen IV) exhaust valves for increased flow includes all head bolts needed for use with these cylinder heads. New q 2-ring positive oil control seals factory head bolts may also be used. Because factory bolts are a torque- q Valve springs accept camshafts with up to .650” lift to-yield type fastener, the old head bolts CANNOT be re-used. q Titanium valve spring retainers ROCKER ARMS AND VALVE TRAIN: These cylinder heads are designed IMPORTANT NOTES, READ BEFORE BEGINNING INSTALLATION! to use the stock rocker arms or aftermarket replacement rocker arms designed for the Gen III and Gen IV engines. Due to the intake port design For a successful installation, the Edelbrock Cylinder Heads require some additional components. To complete your installation, you will need the on these CNC-ported heads, the factory rocker bolts can optionally be following items: shortened, or use aftermarket rocker bolts such as Edelbrock #8597. q Head Gaskets: VALVE COVERS: These cylinder heads will accept stock LS3 style valve 61339 - Left: 1161 L-041 / Right: 1161 R-041 or appropriate covers. factory LS3 type. INTAKE MANIFOLD: Cylinder Heads will accept stock intake manifolds. 61349 - Left: 26472 L-041 / Right: 26472 R-041 or appropriate For race-use or pre-pollution controlled vehicles*: Edelbrock’s Super factory LSX type. Victor Carbureted manifold for 4500 series carbs #2821, Super Victor q Stock type intake manifold O-ring seals; GM #19256623 for LS3 Carbureted manifold for 4150 series carbs #2826, Pro Flo XT Manifold intake manifolds. #7142 with fuel rail kit #3648, Super Victor EFI manifold for 4500 style q New cylinder head bolts or studs, with hardened steel washers. throttle bodies #28215, or Super Victor EFI manifold for 4150 style q Heads are machined to accept stock rocker arms. Aftermarket throttle bodies #28265, (EFI manifolds requires fuel rail kit #3638, rocker arm assemblies for Gen III & IV engines may also be used #3629 or equivalent). Use stock type LS3 individual port O-ring seals but may not be an emissions compliant configuration (for race-use (GM 19256623). or pre-pollution controlled vehicles).* EXHAUST HEADERS: These cylinder heads will accept stock exhaust q Correct length pushrods (the required pushrod length is dependent manifolds. For race-use or pre-pollution controlled vehicles*: Exhaust upon camshaft base-circle diameter and any amount that has been headers and a low restriction exhaust system are highly recommended surfaced from the heads or machined from the block. Always check for use with these Edelbrock Cylinder Heads. Exhaust ports are CNC- for correct pushrod length.) The use of an aftermarket camshaft profiled to match stock or Edelbrock #6962 exhaust gaskets which are or altered deck heights may not be an emissions compliant recommended for this application. configuration (for race-use or pre-pollution controlled vehicles).* SPARK PLUGS: Use 14mm x 17.5mm (.708”) reach tapered seat resistor q 14mm x 17.5mm (.708”) reach, tapered seat, resistor-type spark type spark plugs. Heat range requirements will vary by application. For plugs. many applications, GM factory spark plugs or equivalent spark plugs CHECKING PISTON-TO-VALVE, VALVE-TO-BORE AND PISTON-TO- such as Champion RS14YC6, NGK TR55, or Denso IT16 spark plugs may HEAD CLEARANCES: Prior to installation, it is highly recommended be used. Use anti-seize on the plug threads to prevent galling in that piston-to-valve clearances are checked and corrected to minimum the cylinder head, and torque to 10 ft./lbs. Do not over tighten specs, if necessary. These cylinder heads are designed to be used with sparkplugs! If a short reach plug is used, poor performance and factory pistons and camshafts. Use of aftermarket pistons or camshafts possible engine damage may occur. or any other alterations may require custom machining and may not be an emissions compliant configuration (for race-use or pre-pollution controlled vehicles).* Catalog #61339, 61349 ©2017 Edelbrock LLC Rev. 11/17/17 - NP Page 1 of 2 Brochure #63-61339 INSTALLATION: Installation is the same as for original equipment Figure 1 - Cylinder Head Bolt Torque Sequence cylinder heads. Consult a factory service manual for specific procedures, (Edelbrock and ARP head bolts only. Refer to manufacture’s if necessary. Factory manuals can be purchased direct from Helm® recommendation if using different head bolts.) at: www.helminc.com. Be sure that the surface of the block and the surface of the head are thoroughly cleaned to remove any oily film before Standard LS Blocks installation. Use alcohol or lacquer thinner on a lint-free rag to clean. (Four Bolts/Studs Per Cylinder) NOTE: Be VERY careful to remove any coolant or other fluids that First Pass: Torque all M11 bolts (B1-B10) in sequence, to 25 ft./ may be in the cylinder head bolt holes in the block. These bolt holes lbs. are sealed at the bottom, and any fluid trapped in the holes will Second Pass: Torque all M11 bolts (B1-B10) in sequence, to 45 ft./ cause the block to crack when torquing down the bolts. lbs. This must be done on the top rows of the block (A1-A5 - See Fig Final Pass: Torque all M11 bolts (B1-B10) in sequence, to 75 ft./ 1) as oil will be present once the factory cylinder heads have been lbs. removed. Make sure to remove all oil from these bolt holes before Torque M8 bolts (A1-A5) in sequence shown to 25 installing the new heads. ft./lbs. When using the GM factory head bolts, be sure to replace all of the LSX Blocks bolts with new bolts, and to follow the factory recommended installation (Six Bolts/Studs Per Cylinder) procedures. The factory bolts and installation procedures do not call for First Pass: Torque all M11 bolts (B1-B10) in sequence, to 25 ft./ the use of oil or any lubricant on the threads. When using aftermarket bolts lbs. or studs, follow the manufacturer’s recommended torque specifications (See Figure 1 for factory tightening sequence). Second Pass: Torque all M11 bolts (B1-B10) in sequence, to 45 ft./ lbs. NOTE: A Torque Angle Gauge is required for proper installation. Final Pass: Torque all M11 bolts (B1-B10) in sequence, to 75 ft./ Torque to yield fasteners are not designed to be re-torqued after lbs. installation. Torque M8 bolts (C1-C8) in sequence shown to 25 SPECIFICATIONS: Victor Jr Heads ft./lbs. Head Bolt Torque: See Figure 1, or use head bolt Torque M8 bolts (A1-A5) in sequence shown to 25 manufacturer’s specifications ft./lbs. Deck Thickness: 5/8” Combustion Chamber Volume: 69 cc Valve Size: Intake - 2.200” Exhaust - 1.600” Valve Seats: Hardened ductile iron, non- interlocking, compatible with unleaded fuel Valve Spring Diameter: Beehive type spring,1.300” at base of spring Valve Spring Installed Height: 1.800” Valve Spring Seat Pressure: 130 lbs. @ 1.800” Valve Spring Open Pressure 327 lbs. @ 1.300” Max. Valve Lift: .650” Coil Bind 1.120” EMISSIONS GUIDE: *Engine Swaps: Intended to be used with engines that have been trans- planted or swapped into an uncontrolled or pre-pollution controlled vehicle, as defined above. They are not legal for use on pollution controlled vehicles.

*Pre-Pollution Controlled Vehicles: Legal for use on pre-pollution controlled vehicles. They can be used on all vehicles that were manufactured before emissions control regulations were imposed. These vehicles are considered “uncontrolled vehicles.” Pre-Pollution controlled vehicles are defined as: 1965 and older U.S. manufactured California Certified vehicles 1967 and older U.S. manufactured Federally Certified vehicles 1967 and older Foreign manufactured vehicles